n3x could mean : Attention USS Dallas, procced at maximum speed to
primarry target area arm all weapons and stand by for national command
athority to releas, signed COM-SUB-SINC-PAC-LAN
while
n4r could stand for "a"
The long and short of it is if you want high band width then you need
short wavelenth which translates to line of sight.
If you want ground wave for long didtances, then you will be useing a
long wavelength and sending in amplitude modulated code.
BTW the "resonating frequencty" of the Earth or Schoumon resonance is
around 3.5 kHz, and can be tapped into with 2 steal salad bowls (45cm )
and 2 peices of copper or brass pipe about 1.5m each
One pipe should fit snuggly inside the other
drive the larver pipe into the ground
drill a small hole in it near the top
tap the hole
insert secon peice of pipe inside the first.
use bolt to secure them
you now have a variable length tuneable antenna.
place sphear o top and connect amplifier
now you are ready to tune in to the earth.
If you do everything correctly you should receive a low frequency growl
that has a chaotic character.
You are listening to lighting strikes all over the plannet. Have fun